You're thinking of it wrong, the seeds of the thinking error are here: "I wonder how soon it becomes actually infeasible to operate a website with actual original content".
Bots want original content, no? So what's the problem with giving it to them? But that's the issue, isn't it? Clearly, contextually, what you should be saying is "I wonder how soon it becomes actually infeasible to operate a website for actual organic users" or something like that. But phrased that way, I'm not sure a CDN helps (I'm not sure they don't suffer false positives which interfere with organic traffic when they intermediate, more security theater because hangings and executions look good, look at the numbers of enemy dead).
Take measures that any damn fool (or at least your desired audience) can recognize.
Reading for comprehension, I think Rachel understands this.